Mechanism for platen presses



May 11 1926. 1,584,469

S. H. PLUM, 2D., ET AL.

TRIPPING MECHANISM FOR PLATEN PRESSES Filed Sept. 22, 1925 avwewcow Patented May 11, 1926.

orrae arms rarer FHQE'.

s. HAINES PLUM, 2D, or MADISON, Ann AMOS ACKLEY, or CAMDEN, NEW JERSEY, As-

srenons r0 AMERICAN TYPE rounnnns C01VIPANY,'A CORPORATION OF NEW JERSEY.

[DRIPPING- MECHANISM PLATEN PRESSES.

Application filed September 22, 1925.. Serial No. 57,858.

This invention relates to improvements in automatic tripping mechanism for use on job platen presses, More particularly this invention relates to certain improvements on the tripping mechanism disclosed in our pending application for a patent filed July 30, 1925, Serial Number 17,139.

The said application discloses a tripping mechanism which automatically trips the press when the sheets fail to reach the platen, but which is manually operated to untrip Or reset the tripping mechanism.

The improvements disclosed herein consist in automatic means for untripping or resetting the tripping mechanism after it has been tripped and the object of this in vention is to provide a mechanism of generally improved character to accomplish this result. Accordingly this invention comprises such features, arrangements and combinations of parts as are hereinafter set forth while reference is had to the accompanying drawing in which Figure 1 is a partial side view of a platen press equipped with an automatic tripping mechanism embodying the invention.

Figure 2 is a fragmentary view of a portion of the press which has been omitted in Figure 1.

Figure 3 is a detail view of certain parts of the mechanism shown in Figure 1.

Figure 4 is a detail view showing parts of the tripping mechanism in a certain position different from that in whlch the said parts are shown in Figure 1.

Figure 5 is an enlarged detail view of certain parts shown in Figure '1;

In the drawin and in the following specification we have illustrated and described only so muchof the mechanisms disclosed in the aforesaid pending application as is necessary to understand the particular improvements to which this invention relates. Accordingly we have illustrated'in outline a platen press of the well known Chandler & Price type. The press is identified by the name 3, the platen pivot 5 and the platen '2 the usual form member operated by means of, reds in. a well known secured to the press manner, only one connecting rod being shown, and in the drawing only the one side of the press and the other mechanisms have been illustrated.

The reference numeral13 illustrates the usual Chandler & Price tripping means which need not. .be particularly described except to say that when the tripping lever 14 is moved to the left in the drawing from the position shown in Figure 1, the said tripping means actuate the link 132 to rotate the eccentric shaft 130 to trip the form. in a well known manner. The tripping lever 14 is suitably pivoted to the frame at 12.

The press is equipped with an automatic feeding mechanism which is so connected to the tripping mechanism that when a sheet fails to reach the platen the press is tripped. Referring to the drawing the paper 15 to be printed is supported on an inclined feed table 18 which rests on suitable brackets 20 On the feed table is mounted an Oscillating pneumatic separating mechanism of which it is sutlicient to say that it comprises swinging arms 76 car- 'rying a hollow shaft 77. To the latter is secured a nozzle support 57 which carries a separating nozzle 58. Suction is applied to the nozzle from a suitable pump, not shown, through a hose connection 52.

The operation of the feeding mechanism is as follows. When the parts are in the position shown in Figure 1 suction is applied to the nozzle to separate the top sheet from the pile and the separating mechanism is then swung to the left in Figure 1 to deposit the sheet on the platen. The operating means for the separating mechanism is not shown but is disclosed fully in the said pending application to which we also refer for other details concerning the detailed operation of the several parts above described. The tripping means in accordance with this invention consists of a tripping arm 20 which is pivoted on the pivot 12. of the tripping lever. The lower end of the arm is at 21 connected to an actuating link 22, the upper of which is "ivots'd at new a clamp 24,

hook 165 formed The tripping lever 14 carries alatch 29 and the parts are so arranged that during the normal operation of the press the trip arm oscillates on the pivot 12 but does not engage the latch 29 because the latter is held in a normal retractedor upper position. Vi hen, however, platen the latch 29 is lowered so as to be in the path oftrip arm hook 27 whereby said hook will engage the latch and swing the tripping lever to the left in the drawing into tripping position to trip the form. And immediatelythereafter the trip arm hook 28 will engage the other side ofthe latch 29 to move the tripping lever 14 back into normal position. The tripping lever will be continuously swung on its pivot 12 from normal to tripped position and vice versa by the trip arm 20, until the latch 29 has been retracted and moved out ofthe path of the hooks 27 and 28.

The means for operating the latch 29 are as follows. The reference numeral 166 denotesa tripping cylinder which is connected by a hose 183 to the aforesaid hollow shaft shown, and a piston stem 167. The latter is pivoted at'163 to a trip catch lever 169 pivoted at 170 to the arm 76. The trip catch lever and the piston stem 167 are held in normal downward position on a stop pin 171 by means of a spring 172 which acts against a pin 17 3 in the trip catch lever. The catch lever has a hook 174 adapted to engage a in the upper end of an upwardly extending lever 164 pivoted on a shaft 67.

The lever 164 is connected by alink 163 to the depending branch of a bell crank .30 fast on shaft 156 mounted in a bracket 32 on the feed table. To the said shaft is further secured a depending arm 33. On the i said bracket 32 is suitably pivoted at 267 a handle 268 which has a hook 154. A spring 161 tends to keep the upper end 158 of the bell crank 30 up against the said hook 154, and another spring 271 urges the hook against the end of the bell crank. It follows that the arm 33 is held in normal immovable position by the springs.

The lower end 34 of the arm 33 forms a finger which normally abuts an upstanding arm 35 which is secured to a shaft 36 mounted on the tripping lever 14. In front of the latter there is secured to the shaft 36 atrip disk 37 having a pin 33 and a stop 39 adapted to be held against a pin 40 111.

the lever 14 by the spring41. A'portion of the shaft 36 is reduced and forms a pin 42 in front of which the shaft is formed with a head 43. On the said reduced shaft portion 42 and between the head 43 and the trip a sheet fails to reach the the parts are in trip arm 20.

shaft 156 and move wliich through the notches marked 48, 49 and 50. The latch lever is'under 'a normal downward pull by a spring 51. The notched portions of the latch lever is best seen in Figure 5.

Theoperation is as follows. Normally I the position shown in Figure 1 to which it will be seen that the latch actuating slide 44 hangs on the pin 42, the notch 48 fitting over said pin and being kept in this position by'the spring 51. In this position the latch 29 is normally reti'acted. The, trip arm 20 swings continually on its pivot 12 and is so arrangedthat the hook 27moving in the are 100 in Figure 4, passes just below the trip latch 29 without engaging it. Figure 4 shows the trip arm 20in its extreme right hand position where it will be seen that the, hook 28 has moved up to latch. 29 on the leftward stroke of the The hook 27 again passes below the latch 29 withouttouching it.

Referring nowto the operation of the part of the mechanism locatedabove the feed table 18 it will be seen that during the normal operation as the separating mechanism swings from the paper to the platen, the hook 174 ,on the trip catch lever would engage the hook 165 on the arm 164, move the latter to the left and through the link 163 operate the bell crank 30 to rotate the the finger 34 of the arm 33 to the left also. And this movement will, of course, actuate lever 14. p 7

However, this does not occur, because when the suction is applied to the nozzle, it is also applied to the trip cylinder 166 through the hose 183, connecting the cylinder to the hollow shaft 77, hence the piston in the said cylinder and the piston stem 167 are pulledup and the hook 174 is moved upwards out of the way of the hook 165 and, of course, the latter and the arm 164 do not move, the arm 33 is not moved and the press is not tripped. 7

hen, on the other hand, the suction noz- Zle fails to pick up a sheet, there is, of course,

no vacuum created inthe system and con- .sequently the piston stem 167 is not lifted so that as the arm 76 swings to the left in Figure 1, the, hook 174 engages the hook 165 away from the hook 154 and the hand 268 is then by a spring 271 moved clockwise until its lower end strikes the pin 177 and thus the the arm 35 on the tripping v instrumentalities aforesaid causes a leftward movement of the arm bell crank 30 cannot be moved upward into normal position until the said handle 268 has been reset into the position shown.

lVhen the arm 33 and finger 3st are moved to the left as aforesaid, the linger 34L strikes the upstanding arm 35 and rotates the trip disk 2-57 in an anticlockwise direction and the pin 38 kicks the latch actuating slide 4.4 oil the pin 4L2 and the spring 51 then pulls said slide and the latch downwardly the slide coming to rest with its notch l9 on the pin 42. This occurs at the end of the opening movement of the press when the trip arm is almost at the end of its movement to the right. As new the upper end of the trip arm passes to the right under the latch the hook 27 will lift said latch until the hook has passed under the latch and the arm 20 at the end of its rightward movement Figure 4.. lVhen now the press closes the book 27 engages the latch and moves the tripping lever 1% into tripped position and the press is tripped in the usual manner. On the following opening movement of the press, however, the hook 28 engages the latch 29 and moves the tripping lever lt back into normal position, thus untripping the press.

If the trouble with the suction mechanism has been attended to and the handle 268 moved back into normal position as shown, the spring 161 will move the bell crank 30 back and reposition the arm 33 and finger 34: so that the finger 34: is no longer in position to actuate arm 35 on the trip disk. lVhen now the trip arm 20 moves leftward on the following closing movement of the press the inclined cam 26 on the trip arm will lift the latch 29 and the slide 44- upwardly and off the pin 42. The hook 27 willthen pass under or below the latch 29 without operating the tripping lever l l. As the latch slide l t is lifted as aforesaid the trip disk is also rotated clockwise back into normal position by the spring 41 permitting the spring 51 to pull the latch slide slightly to the right and downwardly to again seat said slide with its notch 48 on the pin 12 and the parts are restored to normal position.

If the trouble which causes the suction mechanism to fail is not attended to, the latch 29 and slide at will not be reseated as aforesaid when they are lifted, and consequently the latch will be kept in contact with cam 29 by the spring 51 and the latch will again be engaged by hook 27 and the tripping lever moved into tripping position.

To sum up: lVhen the suction mechanisms fails to act the latch 29 is automatically lowered into the path of the hook 2?. The hook in passing under the latch lifts it mementarily to be immediately thereafter engaged by hook 27 to trip the press, and then:-

1 00,11: err-eas th la ch an h ther nthen the piss-SS is side and moves the tripping lever back into normal position.

As now the trouble has been attended to the cam 26 will. lift the latch up out of the way of the hook 27 and the latch will be automatically reseated out of the path of hook 27 and the press will remain untripped, but if the trouble has not been attended to the lifting of the latch will not permit it to be reseated, but it will remain downward in the path of hook 2'? and the press will again be tripped. The automatic tripping and untripping of the press will continue automatically until the operator resets the handle 268 and permits the auton'iatic resetting of the depending arm 33 into normal position by the spring 161.

lVhen it is desired to hand feed the press the opera-tor takes hold of the handle 47 and lifts the slide and at the same time slightly tilts it so that the notch 50 is brought to rest on the pin 42 and the latch 29 is thereby permanently lifted out of reach of the trip arm 20.

For the sake of completion it should be noted that when the hook 174: has engaged the hook 165 to actuate the tripping means the said hooks are disengaged as the suction mechanism swings to the left in the drawing by the pin 173 riding fixed cam 175 to disengage the two hooks and leave the bell crank 30 free to be reset by the spring 161 when the handle 268 has been repositioned by the operator.

The foregoing is thought to fully describe this invention and it will be seen that but very few elements have been added to the tripping lever in order to eliect the automatic untripping of the press.

This invention has been disclosed in its preferred form, but it is to be understood that nothing hereinbefore stated is to be construed as a limitation, because changes and alterations may easily be made by those skilled in the art without departing from the spirit of the invention or the scope of the appended claims.

We claim 1,. The combination of a platen press tripping mechanism, a tripping lever for operating the same a latch on the said tripping lever, means for maintaining said latch in a normal retracted position. means for releasing the latch from said normal position when the press is to be tripped, a trip arm operated by the press and means on said trip a rm for engaging said latch to move the said tripping lever into tripping position.

2. The combination of a platen press tripping mechanism, a tripping lever for opcrating the same, a latch on the said tripping l ver, means for nniintaining said latch in a normal retracted position. nieans for rele 7 ing the latch from said normal posi ion t tripp d 1 1 area up OVGI and On 2L operated by the press and means on said trip arm for engaging said latch to move the said tripping lever into tripping position, and immediately thereafter back into normal untripped position.

3. The combination of a platen press tripping mechanism, a tripping lever for operating the same, a latch on said tripping lever, means on the latter for maintaining said latch in a normal inactive position, automatic means for moving said latch into active position when the press is to be tripped and means operated by the press for engaging said latch in its active position to move the tripping lever into tripping position.

i, The combination of a platen press tripping mechanism, a tripping lever for operating the same, a latch on said tripping lever, means on the latter for maintaining said latch in a normal inactive position, automatic means for moving said latch into active position When the press is to be tripped and means operated by the press for engaging said latch in its active position to move the tripping lever into tripping position, and immediately thereafter back into i'iormal untripped positon.

5. The combination of a platen press trip ping mechanism, a tripping lever for operating the same, a device mounted on said tripping lever for operating the latter, means for positioning said device in a giver position when the press is to be tripped, means operated by the press for engaging said device to move the tripping lever into tripped position and back into untripped position, and means on said press operated means for moving said device away from the said given position for the purpose set forth.

(3. The combination of a platen press tripping mechanism, a tripping lever for operating the same, a device mounted on said tripping lever for operating the latter, automatic means for positioning said device in a given position When the press is to be tripped, means operated by the press for engaging said device to move the tripping lever into tripped positon and back into untripped position, and means on said press operated means for moving said device away from the said given position for the purpose setforth.

7. The combination of a platen press tripping mechanism, a tripping lever-for operating the same, a latch slidably mounted on said tripping lever in a normal inactive po sition, a trip arm for engaging said latch;

automatic means for releasing said latch from its said normal position and cause it to move into an abnormal active position, means on said trip arm for engaging said latch in its said active position to move the said tripping lever into tripped posit-ion and back into untripped position, means on said trip arm for automatically moving said latch back into normal inactive posi tion after the tripping lever has been moved into untripped position and auto matic means onthe tripping lever for locking the said latch in its said inactive position after it has been moved back thereto as aforesaid.

8. The combination With a tripping mech anism for a platen press including a trip ping lever for operating the same, of adevice for moving said tripping lever into tripped position and back into untripped position comprising a latch mounted on said lever, a trip arm for engaging said latch to move the said lever as aforesaid, means for maintaining said latch out of reach of said trip arm during the normal operation of the )I'GSS, means for moving said latch into the path of the said trip arm when the press is to be tripped, means on the trip arm for engaging the latch as aforesaid, means on the tr p arm for automatically moving the latch out of the path of the said engaging means and means on the tripping lever for automatically resetting the latch in position out of reach of the said trip arm.

9. The combination with a tripping mechanism for a platen press including a tripping lever for operating the same, of a device for moving said tripping lever into tripped position and back into untripped position comprising a latch mounted on said lever, a trip arm for engaging said latch to move thesaid lever as aforesaid, a slide pivoted to said latch, means for locking said slide in one given position to keep the latch out of the path of said trip arm, means for automatically moving said slide into another given position to project said latch into the path of said trip arm, and means for automatically moving said slide into the said one position and locking it after the said tripping lever has been operated as aforesaid.

10, The combination With a tripping mechanism for a platen press including a tripping lever for operating the same, of a device for moving said tripping lever into tripped position and back into untrippeu position comprising a latch mounted on said lever, a trip arm for engaging said latch to move the said lever as aforesaid, a slide connected to said latch and provided with a plurality of notches, a pin on said tripping lever, means for positioning said slide with one of its notches in engagement with said pin to maintain said latch in inactive position, automatic means for disengaging the said one notch from the said pin and cause the latter to be engaged by another notch to project said latch into active position, means on said trip arm for engaging the latch in its active position to-move the lill) tripping lever as aforesaid, means on said trip arm for lifting the slide off the said pin and automatic means for causing the said first named slide notch to re-engage the said pin to reposition said latch in inactive position.

11. The combination of a platen press tripping mechanism, automatic means for actuating the same including a tripping lever for operating the same, a latch mount- 10 ed on said lever and adapted to be auto matically moved into one of tWo different positions depending upon Whether the press is to be tripped or not tripped and means for moving said latch into a third neutral 15 

